Wilbur v



W. V. PAINE M 2 1933 FILTER FOR DUST COLLECTORS R 18 822 Original Filed Dec. 19, 1928 Reissued May 2, 1933 UNITED STATES PATENT OFFICE"- WILBUR V. IPAINE, OF EAST HARTFORD, CONNECTICUT, ASSIGNOR TO THE SPENCER TURBINE COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNEOT- FILTER FOR DUST COLLECTORS Original No. 1,813,896, dated July 7, 1931, Serial No. 327,067, filed December 19, 1928. Application reissue filed November 25,

My invention relates more particularly to that class of devices that are employed for Separating dust and other, foreign material from air to purify the latter, and an object of my invention, among others, is to provide a filter so constructed that the filtering elements may be readily installed or removed from a case in which they are usually located.

One form of a device embodying my invention and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawing, in which Figure '1 is a view, partially in vertical central section, of a dust collector embodying filters equipped with my improved fastening device."".-

. Figure 2 is a view, scale enlarged, in section through the lower end of a filter and through the parts to which this lower end is secured.

Figure 3 is a view of the lower end of the filter showing the means for engaging it with .or disengaging it from its holder.

My improved filter, while not limited in its use to any designated apparatus, is particularly ,efiicient for the purpose of cleansing air from dust and dirt or other foreign matter, and in connection with vacuum cleaning structures especially. I have, therefore, illustrated herein my improved filter as applied toa vacuum cleaning apparatus which may be of any old and well known construction.

In the drawing the numeral 5 denotes a filter case having an inlet 6 and an outlet 7 through which air is induced to fiow as by means of a pump in a manner that will be readily understood by those skilled in the art. A number of filters 8 are suspended within the case as from a support 9, these filters being preferably in the form ofbags or tubes open at their lower ends and closed at their opposite ends. They are composed of fabric quite closely woven so that practically nothing but air will pass through the meshes. The filters are suspended as from springs 10 secured to the ends of the tubes 01' filters and to the support 9, as shown in Figure 1 of the drawing. A plate 11 extends across the case near its lower end dividing it for 1931. Serial No. 577,371.

into a filter chamber 12 in which the filters are located and a collector chamber 13 in which the heavier particles of matter are retained. All of the parts thus far described are of old and well-known construction,and,

except in connection with my device now to be described, form no part of my present lnventlon.

My invention has particularlyto do with the means for securing the lower ends of the bags or filters in place so that they may properly receive the currents of dust-laden air flowing into the mouths of the filters at their lower ends.

of cleansing them from the fine particles of dust with which they become impregnated. Considerable difficulty has been encountered It is necessary that the filters shall (i be removed from time to time for the purpose in prior apparatus in removing these filters, A

butI have overcome this difficulty by providing a ready means whereby the filtering elements may be readily loosened and removed and may be as readily secured in place after they have been cleansed. In carrying out my W idea a number of collars 14 are secured in ly and sewing it in a manner thatwill be readily understood. A retainer 17 is located it in this pocket, this retainer being preferably of flexible material that will enable it to be slightly distorted so that it may be removed through the opening in the holder 15. Preferably a piece of metal having spring qualities is employed in each pocket, this being of a size substantially largerthan that of the opening through the holder 15. The springs 1G draw the filters upwardly so that the enlarged end of each filter produced by the retainer 17 will rest against'a holder 15-,thus preserving the filters in proper position to receive the currents of dust-laden air.

When it is desired to remove the filters, access to the lower ends thereof may be had as place.'

. tube suspended from said support and open face of said ring and thereafter to engage lar manner the filters may be replaced, and

after attachment to the springs 10, the lower ends may be thrust through the openings in the collars'14. The spring rings will maintain the proper form of the ends of the filters to cause them to engage the holders 15 and thereby secure the lower ends of the filters in In'accordance with the provisions of the patent statutes I have described the principles of operation of my invention, together with the device which I now consider to repre sent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative, and that the invention may be carried out by other means and applied-touses other than those above set out.

I claim:

- 1.. A dust collector including a support, a collar rising from said support, a holder comprising a ring mounted within the collar and having an unbroken inner surface, a filter at its lower end and adapted to project through said ring, and a retainer attached. to the lower end of said. tube and constructed to be passed through the unbroken inner surthe latter to retain the lower end of said tube in place. i

' 2 A dust collector including a support, an apertured holder, a filter tube yieldingly suspended from said support and open at its lower end and adapted to project through .said holder, and a flexible retainer attached to thelower end of said tube and compres sible to pass through said holder and. then expand-to yieldably engage under the edge of said-holder to retain the lower end of said tube, in place.

3. A dust collector including a support, a collar, a holder comprising a ring mounted within the collar, a filter tube suspended from said support and open at its lower'end and adapted to project through said ring, and a retainer comprising a hoop of yielding material attached to the lower end of said tube and, compressible to a size to be passed through said ring and thereafter to expand to engage the under side of said ring to retain thelower end of said tube in place.

.4. A .dust collector including asupport, a collar, a holder comprising a shoulder in the bore of the collar, a filter tube suspended from said support and open at its lower end and adapted to project through said collar, said tube having a pocket in its lower end, and a retainer composed of yielding material in the form of a hoop-located said pocket and compressible to a size to be passed through said collar'and then to expand to engage the opposite side of the shoulder and to retain the lower end of the tube inplace.

5. A dust collector including a support, a holder. comprising a member having an opening therethrough, a filter tube yieldingly suspended from said support and open at its lower end, and adapted to project through said opening, a pocket formed in the open end of said tube, and a hoop of spring metal of continuous-length secured in said pocket and adapted to be distorted for passage through said opening to-the-opposite side,

6. A dust collector including a flenible a o a filter support, a holder comprising a rmg, 3

a support for said ring, a filter tube attached to said flexible filter support and open at one end and adapted to be projected through said ring, and a retainer comprising a resilient filter support andopen at one end and adapted to be projectedthrough said ring, and an endless retainer attached to an end of said tube and constructed to be compressed to be passed through said ring. and thereafter to expand. to engage the latter to retain the end of said tube in place.

WILBUR v. P INE .95 endless hoop attached to one end of said tube r 9 

